/usr/lib/python3.10/runpy.py:126: RuntimeWarning: 'testtools.run' found in sys.modules after import of package 'testtools', but prior to execution of 'testtools.run'; this may result in unpredictable behaviour
  warn(RuntimeWarning(msg))
Tests running...
======================================================================
ERROR: unittest.loader._FailedTest.fixtures
----------------------------------------------------------------------
ImportError: Failed to import test module: fixtures
Traceback (most recent call last):
  File "/usr/lib/python3.10/unittest/loader.py", line 154, in loadTestsFromName
    module = __import__(module_name)
  File "/build/python-fixtures/src/fixtures-3.0.0/fixtures/__init__.py", line 89, in <module>
    from fixtures._fixtures import (
  File "/build/python-fixtures/src/fixtures-3.0.0/fixtures/_fixtures/__init__.py", line 55, in <module>
    from fixtures._fixtures.mockpatch import (
  File "/build/python-fixtures/src/fixtures-3.0.0/fixtures/_fixtures/mockpatch.py", line 18, in <module>
    import extras
ModuleNotFoundError: No module named 'extras'


Ran 1 test in 0.004s
FAILED (failures=1)
==> ERROR: A failure occurred in check().
    Aborting...